Hi guys I have a 1993 Electra Glide classic, and have have done the following

S&S stealth air filter
185 jet
Screaming Eagle slip ons

Bike is still experiencing some surging (like its running oit of fuel) under wide open throttle at about the 85mph mark. Do I need to step up to larger jet?

Appreciate your thoughts.

 

How many miles? I would start by cleaning the carb and make sure the float level is set properly....

 

The bike has 28,000 miles, and the carb was rebuilt 1500 miles ago (5 weeks ago)

 

Seeing that it's only doing it at WOT I would pull the fuel line and make sure that you are getting sufficient supply. And again, I would also recheck the float level.

 

Do you know what size jets you have in there? Read the nightrider page there's good info on there.

To test the main jetting, you must be in fourth or fifth gear and running fairly high RPM (4000+) then open the throttle all the way to the throttle stop, noting the feel of the bike. Immediately let off the throttle about 1/8 turn and note the feel of the bike. If it seems to accelerate some when you let off the 1/8, your main jet is too lean. If it hesitates or the top speed is poor (i.e. less than 80 MPH) you are too rich. Adjust your main jetting accordingly by increasing or decreasing the jet size by 5. Use your common sense and seat of the pants feel and you will get close enough to do plug reads.

 

It shouldn't be starving for fuel with a 185 main jet but, you could go as high as 205. I think you have a delivery problem. Check the screen on the petcock or for trash in the float bowl. Float level may be too low also.

 

Thanks guys, I really appreciate the advice. We did pull the bowl and checked for debris, it was perfectly clean. Also pulled the fuel line and poured into a empty water bottle and flow seemed good.

It is exactly as described above, it full throttle in top gear, as it hits around 4,000rpm it splitters and dies, like it's run out of fuel. If I throttle back it'll pick back up again

 

So swap a smaller main in there and give it a try at least you'll know right away if it's improved. Is your air filter clean? I just put a 185 in mine it was a 180 before and too lean for the open filter but fine with the stock air box. 185 shouldn't be bogging it down unless your filter is plugged up

 

That sounds VERY similar to what my '90 was doing.

It (no jinxing) appears to have been cured, although I can't say for sure what cured it. I replaced the petcock and the fuel line, and completely rebuilt the carb. My hunch is that it was a meticulous setting of the float level that ultimately solved the problem. All I know is that I had no trouble at all on the Texas run, which included extended periods of time at 80+.

 

Brand new S&S stealth fitted Sunday, this was the first ride so she's all shiny and new